Typescript support: support / load user defined tsconfig.json for transpiling files

Current behavior:

index.spec.ts

import { forward } from '@apps/commons-e2e';

Fails with

Error: Cannot find module ‘@apps/commons-e2e’ from ‘e2e\src\integration’

Desired behavior:

ts-node should load an user defined tsconfig.json to find own path mappings.

Test code to reproduce

1. create a tsconfig.json with a path mapping to a lib
2. create a spec file using this path mapping
3. run cypress

Versions

4.4.0

[kpittman-securus]

@jennifer-shehane any update on the status for this one?

[maxime1992]

I just tried to upgrade to 4.4.0 and ended up with the same error.

Everything was working just fine with that version but if I try to take advantage of the new feature:

TypeScript test files are now supported without using special preprocessors plugins. Addresses #1859.

To have it working previously I had to do the following:

const TsconfigPathsPlugin = require('tsconfig-paths-webpack-plugin');

module.exports = {
  resolve: {
    extensions: ['.ts', '.js'],
    plugins: [
      new TsconfigPathsPlugin({
        configFile: './tsconfig.json',
      }),
    ],
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        exclude: [/node_modules/],
        use: [
          {
            loader: 'ts-loader',
            options: {
              configFile: 'tsconfig.e2e.json',
            },
          },
        ],
      },
    ],
  },
};